EBay acquired the payments processor 12 years ago and it now accounts for almost half of the company’s revenue.

• A federal judge in New York is weighing a punishment for Argentina after he ruled the nation in contempt of court Monday over its refusal to pay bond creditors.

• The F.C.C.unanimously overturned its so-called blackout rule today and will allow cable and satellite TV providers to show sports games even if a game is not sold out locally.

• Walgreens, the nation’s largest drugstore chain, reported a fourth-quarter loss today, mostly on its buyout of Alliance Boots last month. Its stock rose on the 6 percent increase in quarterly sales.

• Lufthansa pilots walked off the job for the fifth time this year in a one-day strike over retirement benefits.

NOTEWORTHY

• Looking for a hit.

Baseball’s playoffs begin tonight when the Oakland A’s visit the Kansas City Royals in the American League wild-card game (8 p.m. Eastern, TBS). It is the Royals’ first postseason game in 29 years.

Don’t expect too many cracks of the bat, though. Big-league hitters batted .251 this year, the worst average since 1972.

• New release.

Gabrielle Giffords, the former Democratic congresswoman from Arizona, and her husband, the retired astronaut Mark Kelly, argue for gun legislation in the book “Enough: Our Fight to Keep America Safe from Gun Violence,” published today.

• Back on track.

Prince, 58, is releasing two studio albums simultaneously today. One is a solo record, “Art Official Age”; the other, “PlectrumElectrum,” is with his funk-rock band, 3rdEyeGirl.

And after a 16-year absence, Fleetwood Mac begins a North American tour in Minneapolis, with Christine McVie returning to join Mick Fleetwood, John McVie, Lindsey Buckingham and Stevie Nicks.

• Gone, and now going, going …

It’s a small, carnivorous dinosaur believed to be 154 million years old. And for an estimated price of a half-million dollars, it could be yours.

A complete Ornitholestes skeleton is being sold today at a Sotheby’s auction in Paris.

BACK STORY

Tens of thousands of people are still blocking streets today in Hong Kong, and the crowds are likely to grow on Wednesday, a holiday celebrating the founding of Communist China.

It’s all about elections.

China assured Hong Kong residents that there could be one “one country, two systems” when Britain’s 150-year rule ended in 1997.

Freedoms of speech and the press in the territory were promised to last 50 years. But choosing the top Hong Kong government official, the chief executive, was left to the National People’s Congress election committee in Beijing.

Then, in 2007, Beijing promised “universal suffrage” for Hong Kong’s 2017 vote, which many residents took to mean open and direct elections for the chief executive.

But on Aug. 31, the Chinese government said that another national committee would have to approve the 2017 candidates — most likely limiting them to pro-Beijing nominees.

The move led to a week of student protests.

On Sunday, the widening demonstrations took an unexpected turn when China’s riot police officers used tear gas on the protesters, raising fears of a Tiananmen Square-like clampdown.

The government withdrew the police soon after, and the demonstrators renewed their gatherings.